Alkali metal recovery from carbonaceous material conversion process
- Seabrook, TX
- Baytown, TX
- Fanwood, NJ
- Galveston, TX
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein solid particles containing alkali metal residues are produced in the gasifier or similar reaction zone, alkali metal constitutents are recovered from the particles by withdrawing and passing the particles from the reaction zone to an alkali metal recovery zone in the substantial absence of molecular oxygen and treating the particles in the recovery zone with water or an aqueous solution in the substantial absence of molecular oxygen. The solution formed by treating the particles in the recovery zone will contain water-soluble alkali metal constituents and is recycled to the conversion process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst. Preventing contact of the particles with oxygen as they are withdrawn from the reaction zone and during treatment in the recovery zone avoids the formation of undesirable alkali metal constituents in the aqueous solution produced in the recovery zone and insures maximum recovery of water-soluble alkali metal constituents from the alkali metal residues.
- DOE Contract Number:
- E(49-18)-2369
- Assignee:
- Exxon Research & Engineering Co. (Florham Park, NJ)
- Patent Number(s):
- US 4193771
- OSTI ID:
- 863531
- Country of Publication:
- United States
- Language:
- English
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metal
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carbonaceous
material
conversion
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coal
gasification
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similar
carried
presence
metal-containing
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solid
particles
containing
residues
produced
gasifier
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zone
constitutents
recovered
withdrawing
passing
substantial
absence
molecular
oxygen
treating
water
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contain
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preventing
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withdrawn
treatment
avoids
formation
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containing alkali
similar conversion
water-soluble alkali
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particles containing
alkali metal-containing
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alkali metal
aqueous solution
carbonaceous material
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coal gasification
coal gas
metal residues
metal-containing catalyst
molecular oxygen
solid particle
solution form
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substantial absence
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